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transport.h
#ifndef __LIBSSH2_TRANSPORT_H #define __LIBSSH2_TRANSPORT_H /* Copyright (C) 2007 The Written Word, Inc. All rights reserved. * Copyright (C) 2009-2010 by Daniel Stenberg * Author: Daniel Stenberg <daniel@haxx.se> * * Redistribution and use in source and binary forms, * with or without modification, are permitted provided * that the following conditions are met: * * Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of the copyright holder nor the names * of any other contributors may be used to endorse or * promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file handles reading and writing to the SECSH transport layer. RFC4253. */ #include "libssh2_priv.h" #include "packet.h" /* * libssh2_transport_send * * Send a packet, encrypting it and adding a MAC code if necessary * Returns 0 on success, non-zero on failure. * * The data is provided as _two_ data areas that are combined by this * function. The 'data' part is sent immediately before 'data2'. 'data2' can * be set to NULL (or data2_len to 0) to only use a single part. * * Returns LIBSSH2_ERROR_EAGAIN if it would block or if the whole packet was * not sent yet. If it does so, the caller should call this function again as * soon as it is likely that more data can be sent, and this function MUST * then be called with the same argument set (same data pointer and same * data_len) until ERROR_NONE or failure is returned. * * This function DOES NOT call _libssh2_error() on any errors. */ int _libssh2_transport_send(LIBSSH2_SESSION *session, const unsigned char *data, size_t data_len, const unsigned char *data2, size_t data2_len); /* * _libssh2_transport_read * * Collect a packet into the input brigade block only controls whether or not * to wait for a packet to start. * * Returns packet type added to input brigade (PACKET_NONE if nothing added), * or PACKET_FAIL on failure and PACKET_EAGAIN if it couldn't process a full * packet. */ /* * This function reads the binary stream as specified in chapter 6 of RFC4253 * "The Secure Shell (SSH) Transport Layer Protocol" */ int _libssh2_transport_read(LIBSSH2_SESSION * session); #endif /* __LIBSSH2_TRANSPORT_H */